National Debit Clock

One of the few ancient buildings and indeed ancient clocks that stands almost intact and in continuous occupation till recent times, the Tower of Winds is a combination of Roman sundial, water clock and wind-vane. An octagonal marble structure with a conical roof, this ancient clock, or Horologion or Tower of the Winds (Aerides) was built by the astronomer Andronicus from Macedonia in the middle of the 1st century BC.

Personifications of the 8 winds, among which Boreas and Zephyros, are carved in the relief at the top of the sides of the ancient clock. The rays of the Roman sundial are carved beneath the wind gods. Inside the Tower of Winds is a water clock which told the time during the night or in cloudy days. On the top of the ancient clock a wind-vane in the shape of a bronze Triton indicated the direction of the wind.

“For the Romans time was weather, weather time, tempus, tempestas”, writes Onians: “The day changes in intelligible order... and is not merely the sky above... but the wind blowing from this quarter or that, soft or strong or not all”. This concept of time of the Romans is accurately depicted on the ancient clock of the Roman Agora in Athens. Eight winds are carved on the sides of the Roman sundial. Among them Boreas and Zephyros.